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Kendo
- 10
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Not sure if this is the right "forum section" but what does "±" mean when it comes to writing a lab report? I don't remember this back in high school but idk.
Kendo said:but what does "±" mean when it comes to writing a lab report?
fresh_42 said:##y= \pm \sqrt{x}## means, that both possible values are considered, e.g. in ##x_{1,2} = -\dfrac{p}{2} \pm \sqrt{\left( \dfrac{p}{2} \right)^2-q}\,.## So it's ##x_1=-\dfrac{p}{2} - \sqrt{\left( \dfrac{p}{2} \right)^2-q}## and ##x_2=-\dfrac{p}{2} + \sqrt{\left( \dfrac{p}{2} \right)^2-q}\,.##
##G = (6.674 08 \pm 0.000 31) \cdot 10^{-11} \,\dfrac{m^3}{kg \cdot s^2}## means, that the gravitational constant isn't known exactly but only up to a certain amount of significant digits. It is around ## 6.674 08 \cdot 10^{-11} \,\dfrac{m^3}{kg \cdot s^2}## but possible values range between ##6.673 77 \cdot 10^{-11} \,\dfrac{m^3}{kg \cdot s^2}## and ##6.674 39 \cdot 10^{-11} \,\dfrac{m^3}{kg \cdot s^2}\,.## Of course there is only one exact value, but we currently cannot measure it better than within this range.
Yessymbolipoint said:That symbol means, "plus or minus".
Also it can be read, "The positive or the negative of...".
Kendo said:Not sure if this is the right "forum section" but what does "±" mean when it comes to writing a lab report? I don't remember this back in high school but idk.
FRANCOIS SIMON said:The simplest way to define it: "±" indicates a tolerance of a given nominal value. For example, "The result of the poll is 60% against, with an error margin of ± 5%". So the result is between 65% and 55%.
Plus/minus, also known as +/-, is a statistical measure used in sports to indicate the impact of a player on the outcome of a game. It is calculated by subtracting the number of goals scored against a team while a specific player is on the ice from the number of goals scored by the team while the player is on the ice.
Plus/minus is calculated by taking the number of goals scored by a team while a specific player is on the ice and subtracting the number of goals scored against the team while the player is on the ice. The resulting number is the player's plus/minus rating.
A positive plus/minus indicates that a player's team has scored more goals while the player is on the ice than they have allowed. This is seen as a positive contribution to the team's success.
A negative plus/minus indicates that a player's team has allowed more goals while the player is on the ice than they have scored. This is seen as a negative contribution to the team's success.
While plus/minus can be a useful tool for evaluating a player's impact on a team, it is not always a reliable measure of performance. It does not take into account factors such as the quality of a player's teammates or the strength of the opponents they are facing. Additionally, plus/minus can be heavily influenced by luck and random chance. It is best used in conjunction with other statistical measures to get a more complete picture of a player's performance.